Tube slotting machine



June 1952 c. MGAULIFFE 2,600,669

TUBE SLOTTING MACHINE Filed Oct. 1, 1949 2 SHEETS-SI-1EET l June 17, 1952 c, MOAULIFFE 2,600,669

TUBE SLOTTING MACHINE Filed Oct. 1, 1949 2 SHEETS-SHEET 2 Patented June 17, 1952 UNITED STATES PATENT OFFICE "IUBEv SLOTTING cli fllid L. ,McAtflifie, San Pedro, Calif.

- Application October 1, 1949, Serial No,-1 1 9,1 29

7 Claims. (Cl. 164-42.)

This-in entiqnre etes tea tub slo ti g m chine, and particularly amachine which will slot the;end of; pipe, and particularly sheet metal pine. s ha t e ou or slotted ends of the p can be flared outwardly forthe purpose of attaching a short length of pipe to a wooden concrete form.

object of my invention is to provide a novel tube slotting machine which will out or slot the end of a length of pipe, and will regularly space these cuts to 0 7 1! adjacent tips on the end of the pipe-z Afeatu e f my invention resides in the novel m ans whereby the length of pipe i clamped in he m chi e. an i interm t e ly r dr v machine. The cutting or slotting of the tube is accom i hed while the e i s nar i l. nother iec o m in t s t ovide 1a novel tube slotting machine,- which will automa ical y pace e uts n h nd t tubeand willquickly and effectively accomplish the required cutting or slotting of the pipe.

Otherobjects, advantages and featuresof the invention ma a pear f m e c pa in drawing; the subjoined detailed description and the appended claims.

Inthe drawin Figure 1 is a side elevati n of my tube slotting machine.

Fi ure 2 is aside levat n-efe ine kenpf the side p osite o th t ho Fi ure 1.

ure 3 is a top plan view f mvm ebi u e 4 is amen a ee fra me a s c al view taken on line 4-4 of Figure 3.

Figure 5 is a fragmentary view taken in the direction of line 5-5 in Figure 4.

Figure 6 is a fragmentary view taken in the direction of line 6--.6 in Figure i.

Referring more particularly to the drawing, the numeral] indicates a frame rably built up of structural parts and sufiiciently rigid to supp rt the various parts thereon, which will be subsequently described. A motor 2 (preferably electric) is mounted on the frame I, and this motor drives the gear box. 3through the belt ll, or other suitable drive means. The pulley 5, which is driven from the gear box 3, drives the power shaft 6 through the belt 1, or other suitable drive means. The power shaft 6 is suitably journalled in the frame I in a manner which is usual and well known in the art. A cutter or shears 8 is mounted on the top of the frame I in the following manner:

The one arm of the shears 9 is bolted to the top of the frame I, as shown at I0. The movable arm II of the shears 8 is continuously reciprocated by a cam drive from the power shaft 6. and this drive includes a cam I2 fixedly attached to theshaft 6. A strap I3 surrounds the cam, I2, and is journalled on the periphery of the cam in the usual manner. A pitman I4 extends from the strap I3 to the arm II, and the pitman may be adjusted in any one ofthe holes I5 in the arm. The stroke of the arm II may thus be changed as desired. A knurled drum I5 is mounted on the shaft II,- and this shaft is journalled in the frame I, and projects horizontally from the frame. v

Th shaft I1 and the drum I6 are intermittently rotated by a suitable pawl and ratchet or escapement gear, as follows:

A second cam I8 is attached to the power shaft 6, and is thus continuously rotated. A strap I9 encircles the cam I8, and a pitman 20 extends from the strap I9 and is pivotally secured to an arm 2I. The arm .2I is pivotally secured to the frame I at its inner end, and a connecting rod 22 is pivotally attached to the outer end of said arm. The upper end of the co necting rod 22 is pivotally secured to an arm 23, which is journalled on the shaft I1. The-arm 23 carries a pawl 24, which engages the gear 25 on the shaft I1. The pawl 24 drives the gear 25 in one direction of movement of the arm 23, and escapes the gear in the opposite direction of movement of the arm 23, therefore, the shaft I1 and the drum IE will be rotated intermittently.

To hold the tube 26 tightly in engagement with the drum I5, I provide a knurled roller 2I, which ispressed against the drum It in the following manner:

The roller 2! is eccentrically mounted on a shaft 28, which; is journalled on top of the frame I. An arm 29 protrudes from the shaft 28, and a rod 30 extends from this arm to. a foot lever 3|, journalled on the lower end of the frame I. By stepping on the. foot lever 3|, the shaftls will bepartially rotated, thus moving theroller 2'! away from the drum l6 and permitting tube 26 to be positioned soas to be cut by theshears 8. A spring 28 bears against a projecting finger 26 on the shaft 28, thus tending to rotate said shaft and press the roller 21 against the drum I6, thereby clamping the tube 26 in position to be cut by the shears 8 and to be intermittently rotated, as described above.

An adjustable stop 32 is mounted on top of the frame I and this stop is positioned adjacent the shears 8 and is engaged by one end of the tube 26 thus determining the length of the slot or out which is made by the shears in the tube.

Having described my invention, I claim:

1. A tube slotting machine comprising a frame, a motor mounted on said frame, shears mounted on said frame, drive means extending from the motor to the shears to continuously reciprocate said shears, a drum positioned below the shears and rotatably mounted in said frame, an intermittent drive means extending from the motor to said drum, and tube clamping means adjacent said drum and spaced therefrom and adapted and arranged to press a tube against said drum, said shears being positioned between said drum and said clamping means and parallel to the axis of the drum.

2. A tube slotting machine comprising a frame, a motor mounted on said frame, shears mounted on said frame, drive means extending from the motor to the shears to continuously reciprocate said shears, a drum positioned below the shears and rotatably mounted in said frame, an intermittent drive means extending from the motor to said drum, a tube clamping roller mounted adjacent said drum and extending parallel thereto, and manually actuated means engaging said roller to press said roller towards said drum, the tube to be out being clamped between the roller and the drum, said shears being positioned between said drum and said clamping roller and parallel to the axis of said drum.

3. A tube slotting machine comprising a frame, a motor mounted on said frame, shears mounted on said frame, drive means extending from the motor to the shears to continuously reciprocate said shears, a drum positioned below the shears and rotatably mounted in said frame, an intenmittent drive means extending from the motor to said drum, a shaft journaled on the frame, a roller eccentrically journaled on the shaft, and manually actuated means engaging and rotating said shaft to press the roller towards the drum and clamp a tube therebetween, said shears being positioned between said drum and said clamping roller and parallel to the axis of said drum.

4. A tube slotting machine comprising a frame. a motor mounted on said frame, shears mounted on said frame, a cam drive mounted on said frame and means connecting the cam to said shears to reciprocate the shears, a drive extending from the motor to the cam, a drum journaled on the frame below the shears, intermittent drive means extending from said motor to the drum, a clamping roller mounted on the frame adjacent said drum, manually actuated means to press said roller towards the drum and clamp a tube between the roller and the drum, said shears being positioned between said drum and said clamping roller and parallel to the axis of said drum.

5. A tube slotting machine comprising a frame. a motor mounted on said frame, shears mounted on said frame, a cam drive mounted on said frame and means connecting the cam to said shears to reciprocate the shears, a drive extending from the motor to the cam, a drum journaled on the frame below the shears, a second cam a motor mounted on said frame, a power shaft journaled on the frame, drive means extending from the motor to the power shaft, shears mounted on the frame, cam means on the power shaft, and a connecting rod extending from the cam means to the shears whereby the shears are continuously reciprocated, a drum journaled on the frame below the shears, a second cam on the power shaft, an intermittent drive means connecting the second cam and the drum whereby said drum is intermittently rotated, a clamping roller adjacent said drum, and manually actuated means pressing said roller towards the drum to clamp a tube therebetween, the axis of said roller parallel to the axis of said drum, said roller adapted to mount a tube with its axis parallel to that of the roller and the drum, said shears positioned between the axis of the drum and the roller and in the plane thereof and adapted to slot the end of a tube.

7. A tube slotting machine comprising a frame, a motor mounted on said frame, a power shaft journaled on the frame, drive means extending from the motor to the power shaft, shears mounted on the frame, cam meanson the power shaft, and a connecting rod extending from the cam means to the shears whereby the shears are continuously reciprocated, a drum journaled on the frame, a second cam on the power shaft, an intermittent drive means connecting the second cam and the drum whereby said drum is intermittently rotated, a clamping roller mounted adjacent said drum, the axis of said roller parallel to the axis of said drum, said roller adapted to mount a tube with its axis parallel to that of the roller and the drum, said shears positioned between the axis of the drum and the roller and in the plane thereof and adapted to slot the end of a tube, a shaft on which the clamping roller is mounted, means journaling the last named shaft on the frame, a foot lever and a link connecting the foot lever and the last named. shaft whereby said shaft is rotated to move said roller towards the drum, and clamp a tube therebetween.

CLIFFORD L. MCAULIFFE.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 694,524 Boyd Mar. 4, 1902 1,313,862 Smith Aug. 19, 1919 1,415,099 Kohler May 9, 1922 

